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Optocoupler IC
MOC3021 IC OptoIsolator Traic Driver IC
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MOC3021 IC OptoIsolator Traic Driver IC
The MOC3021 is a non–zero-cross (random phase) triac driver optocoupler designed to interface low-voltage control circuits—such as microcontrollers, logic circuits, and sensors—with high-voltage AC loads.
Inside the IC, an infrared LED drives a photo-sensitive triac output stage, allowing it to trigger an external power triac.
Because it does not include zero-cross detection, the MOC3021 can trigger the triac at any point in the AC waveform, making it ideal for dimming, phase control, and variable power applications.
The device provides galvanic isolation between control and load sides, improving safety while preventing noise from propagating back into sensitive control circuits.
Features:-
- Excellent IFT stability—IR emitting diode has low degradation
- High isolation voltage—minimum 5300 VAC RMS
- Underwriters Laboratory (UL) recognized—File #E90700
- Peak blocking voltage: 400V-MOC3021
- VDE recognized (File #94766)
Specification:-
| Symbol | Parameter | Value | Unit |
| IF | Forward current | 60 | mA |
| PD | Power dissipation | 100 | mW |
| VR | Reverse Voltage | 3 | V |
| Tstg | Storage temperature range | -40 to +150 | °C |
| TOPR | Operating Temperature | -40 to +85 | °C |
| TSOL | Lead Solder Temperature | 260 for 10 sec | °C |
| ITSM | Peak Repetitive Surge Current (PW = 1 ms, 120 pps) | 1 | A |
| VDRM | Off-State Output Terminal Voltage | 250 | V |
| VISO | Isolation Surge Voltage | 7500 | Vac(pk) |
Applications (Bullet Points)
- AC light dimming
- Fan and motor speed control
- Heater and temperature control circuits
- AC load switching
- Solid-state relay (SSR) circuits
- Home automation AC appliance interface
- Phase-angle controlled power supplies
- Industrial automation and process control
- Triggering main power triacs/thyristors
- Induction and resistive load control
- Programmable AC power regulators
*Product image for illustration purposes only, actual product may vary.
1 review for MOC3021 IC OptoIsolator Traic Driver IC
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MEHUL PATEL (Verified Customer) –
good product
MEHUL PATEL –